﻿//<![CDATA[
var snowsrc = "http://ng6.upanh.com/b3.s22.d3/c8658f14fa2ec4278d2878acfb7639d4_38915776.snowflake11.png" // Thay Link hình c?a b?n vào dây
var no = 50; // S? ?nh roi trên blog
var hidesnowtime = 0; // S? giây ?nh bi?n m?t sau khi roi
var snowdistance = "windowheight"; // Có th? thay d?i giá tr? pageheight thành windowheight 


///////////Stop Config//////////////////////////////////


var ie4up = (document.all) ? 1 : 0;
var ns6up = (document.getElementById && !document.all) ? 1 : 0;


function iecompattest() {
    return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
}


var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var i, doc_width = 800, doc_height = 1600;

if (ns6up) {
    doc_width = self.innerWidth;
    doc_height = self.innerHeight;
} else if (ie4up) {
    doc_width = iecompattest().clientWidth;
    doc_height = iecompattest().clientHeight;
}


dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
snowsrc = (snowsrc.indexOf("dynamicdrive.com") != -1) ? "snow.gif" : snowsrc
for (i = 0; i < no; ++i) {
    dx[i] = 0; // set coordinate variables
    xp[i] = Math.random() * (doc_width - 50); // set position variables
    yp[i] = Math.random() * doc_height;
    am[i] = Math.random() * 20; // set amplitude variables
    stx[i] = 0.02 + Math.random() / 10; // set step variables
    sty[i] = 0.7 + Math.random(); // set step variables
    if (ie4up || ns6up) {
        if (i == 0) {
            document.write("<div id=\"dot" + i + "\" style=\"POSITION: absolute; Z-INDEX: " + i + "; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://dynamicdrive.com\"><img src='" + snowsrc + "' border=\"0\"><\/a><\/div>");
        } else {
            document.write("<div id=\"dot" + i + "\" style=\"POSITION: absolute; Z-INDEX: " + i + "; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='" + snowsrc + "' border=\"0\"><\/div>");
        }
    }
}


function snowIE_NS6() { // IE and NS6 main animation function
    doc_width = ns6up ? window.innerWidth - 10 : iecompattest().clientWidth - 10;
    doc_height = (window.innerHeight && snowdistance == "windowheight") ? window.innerHeight : (ie4up && snowdistance == "windowheight") ? iecompattest().clientHeight : (ie4up && !window.opera && snowdistance == "pageheight") ? iecompattest().scrollHeight : iecompattest().offsetHeight;
    for (i = 0; i < no; ++i) { // iterate for every dot
        yp[i] += sty[i];
        if (yp[i] > doc_height - 50) {
            xp[i] = Math.random() * (doc_width - am[i] - 30);
            yp[i] = 0;
            stx[i] = 0.02 + Math.random() / 10;
            sty[i] = 0.7 + Math.random();
        }
        dx[i] += stx[i];
        document.getElementById("dot" + i).style.top = yp[i] + "px";
        document.getElementById("dot" + i).style.left = xp[i] + am[i] * Math.sin(dx[i]) + "px";
    }
    snowtimer = setTimeout("snowIE_NS6()", 10);
}


function hidesnow() {
    if (window.snowtimer) clearTimeout(snowtimer)
    for (i = 0; i < no; i++) document.getElementById("dot" + i).style.visibility = "hidden"
}

if (ie4up || ns6up) {
    snowIE_NS6();
    if (hidesnowtime > 0)
        setTimeout("hidesnow()", hidesnowtime * 1000)
}
//]]>